共查询到18条相似文献,搜索用时 171 毫秒
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探讨了地板辐射供暖、供冷系统与置换通风系统的组合空调系统的流程,对组合空调系统进行了数值模拟。地板辐射供暖、供冷系统与置换通风系统相结合获得了良好的室内温度场和速度场,提高了空气品质,改善了室内的热舒适性。 相似文献
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带有地板辐射的地板送风空调系统的数值模拟 总被引:3,自引:0,他引:3
本文应用FLUENT软件对带有地板辐射的地板送风空调系统在夏季工况下对室内空气温度场和速度场进行了数值模拟,结果表明带有地板辐射的地板送风空调系统与传统的地板送风空调系统相比,温度变化更小,热舒适性更好。 相似文献
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用CFD方法数值模拟了分体式空调器室内机在室内摆放位置不同时,在相同送风温度和送风速度下,对室内温度场、速度场以及热舒适性的影响.模拟结果表明:相同送风温度和送风速度情况下,不同的室内机位置产生了不同的室内温度场、速度场;与室内布局相适宜的室内机摆放位置可以改善室内舒适度. 相似文献
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采用数值方法对带有地板静压箱的地板送风空调房间的温速度场进行了模拟,获得了平均壁面温度、室内空气温度及热源表面温度与送风气流在地板静压箱内温升等量值;分析了有、无外墙和外窗及有、无内遮阳对静压箱上、下表面温度分布的影响规律以及对地板静压箱内热力衰减的影响;建立了地板静压箱上表面与室内各壁面间的辐射换热模型,计算分析了各壁面与地板间辐射换热量随墙体以及内遮阳状况不同而变化的规律。 相似文献
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张云斌 《建筑热能通风空调》2013,(5):80-82
地板辐射供暖作为舒适、节能的供暖方式,在各类工程中得到了广泛的应用.本文对敷设有地板辐射供暖系统的游泳馆内的温度场、速度场进行了数值模拟,并分析得出应用地暖系统的游泳馆内的温度场、速度场具有分布均匀的特点. 相似文献
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In radiant floor systems, the distribution of the floor surface temperature, which can be used to determine the mean temperature and the lowest/highest temperature of the floor surface, is an important parameter. The mean temperature of the floor surface determines cooling/heating capacity and indoor thermal comfort. The lowest surface temperature, which considers the dew point in an indoor environment, is a crucial factor in the prevention of condensation on a floor surface. The highest surface temperature is typically considered for local thermal comfort. In this paper, an analytical solution for heat transfer in a multilayer floor structure of a radiant floor system is proposed based on the analysis of the heat transfer process of a multilayer floor, equivalent thermal resistance and separation of variables method. The corresponding formulas are derived to estimate the distribution of floor surface temperature. The calculation results are validated by experiments. The calculation and experimental results show good accordance. The absolute error between the calculation and experimental results for floor surface temperature is within 0.3°C. A method for the calculation of the dimensionless temperature of the floor surface, which can be used for radiant heating and cooling systems, is provided. Using this proposed method, the distribution of floor surface temperature and the influence of floor structure parameters on the thermal performance of floors can be estimated and analyzed. 相似文献
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分析了低温热水地板辐射采暖的特点,详细地介绍了低温地板辐射采暖常用的管材及施工工艺,探讨了低温地板辐射采暖的调试与运行,指出低温热水地板辐射采暖无论从节约能源,还是舒适度、室内美观分户计量等各方面都较传统供暖形式优越。 相似文献
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Using the existing floor heating system, the radiant floor cooling system can be used as an alternative to the conventional all-air cooling systems. In this paper, a numerical model for the radiant floor cooling system is built using finite volume method. The objective of this study is to research the effects of the thermal resistance of pipe and water velocity on the performance of the radiant floor cooling system. In order to provide better heat transfer simulation in the pipe, composite grids are used in the model. The numerical floor surface temperature and the heat flux are in agreement with the measured results. The results illustrate that the pipe has effect on the performance of the radiant floor cooling system when the thermal conductivity of the pipe is low. However, the effect of the water velocity on the performance of the cooling system is not great. The model is helpful to calculate and design such kind of radiant floor cooling systems. 相似文献
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通过分析电加热地板辐射采暖传热过程,建立电加热管传热模型,进行方程离散和数值模拟,并分析电加热地板辐射的发热电缆间距、地板面材料等因素对电加热管传热影响.研究结果表明:满足室内热环境条件相同时,地板面热流密度按从大到小依次是大理石、瓷砖、软木板;随着发热电缆间距的增大,地板面温度分布开始出现波动,热流密度逐渐降低,地板... 相似文献
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根据寒冷地区人类居住特点,利用VB语言编程,以ISO7730为理论依据,通过PMV和PPD模拟计算了寒冷地区室内热环境,给出了寒冷地区人体不同代谢率条件下常规采暖和地板辐射采暖的舒适性温度。结果表明,在PPD≤20%的前提下,寒冷地区满足人体热舒适的室内常规采暖设计温度推荐值为20℃,地板辐射采暖设计温度推荐值为19℃,明显高于我国现行的设计温度。 相似文献
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结合工程实例,阐述了低温热水地板辐射供暖的施工工艺流程及操作要点,介绍了其质量要求和质量控制目标,同时提出了安全控制措施,并指出低温热水地板辐射供暖可均匀地向室内辐射能量,从而达到调节室内温度的目的。 相似文献